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Chemistry 10th Class English Medium Online Test MCQs With Answers

Question # 1

When NaHCO₃is heated if forms:

Choose an answer

CO₂

Ca(OH)₂

CaCO₃

CaO

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Question # 2

The heat capacity of water is.

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4.2 Jg^-1 K^-1

2.1 Jg^-1K^-1

3.2 Jg^-1K^-1

5.9 Jg^-1K^-1

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Question # 3

Water has a maximum density at 4 ^oC

Choose an answer

12 cm^-3

2 g cm^-3

1 g cm^-3

4 gcm^-3

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Question # 4

A disease is caused by excess of bile pigments in the blood is.

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Typhoid

Jaundice

Cholera

Dysentery

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Question # 5

Alkanes are produced in large amounts by cracking of

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Natural gas

Petroleum

Benzene

Xylol

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Question # 6

Which of the following in soluble in water.

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Organic acids

Glucose

Alcohal

All of them

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Question # 7

Chemical form of gypsum.

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MgSO₄. 5H₂O

CaSO₄. 2H₂O

FeSO₄. 5H₂O

CuSO₄. 5H₂O

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Question # 8

How much amount of sunlight reaches up to earth and absorbed:

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26%

32%

50%

18%

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Question # 9

The characteristics of reversible reactions are the following except:

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Products never recombine to form reactants.

They never complete

The proced in both ways

They have a double arrow between reactants and products.

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Question # 10

When acid react with carbonates and bicarbonates which gas is evolved?

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CO₂

Cl₂

N₂

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Question # 11

The number of carbon atoms present in gasoline or petrol.

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5-10

6-10

7-10

8-10

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Question # 12

The ability of carbon atoms to form chains is called.

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Isomerism

Catenation

Resonance

Condensation

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Question # 13

Such reactions which continue in both directions are called.

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Irreversible

Reversible

Nonreactive

Dynamic

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